Histograms

Question 1

What is the formula for frequency density

Answer 1

F.d=frequency/class width

Question 2

How to find the median or lower quartile in a histogram

Answer 2

1.Total frequency= tf
2. tf+1/2= x
3.Use formula: [(Z2-Z1) X x-y/higher real frequency number]+lower class width number=answer
.Z2-Z1->higher class width number-lower class width number
.x-> frequency median
.y->lower cumulative frequency number